IRONMAN1- If you have a volt/ohm-meter, check the voltage from the hot to ground/ hot to neutral, at the receptacle. If you have close to 120V then you should have a good ground. It's possible that even though the receptacle has a ground prong that it is not actually grounded. I would open it up and check to see what you have. Trace it back to the panel and see what is going on in there too. Wouldn't hurt to replace the receptacle with a new one too.
With the power off you can check continuity with an OHM meter as well. Should be close to 0 if the wiring is solid.
If you have another outlet near by that you know has a solid ground then run an extension cord and plug your transformers/ bases into that. If the problem goes away then my guess is the problem lies in the circuit you have the trains plugged into.
Finally- a new dedicated circuit from the panel would be my other recommendation.
Beyond that I can't help- I don't run any of the digital systems, strictly conventional in my little world.
Bob
